Ironbark Zinc Ltd (ASX:IBG) major shareholder Toronga Pty Ltd and Dulyne Pty Ltd have increased their joint major shareholding in the company to 11.27% from 10.02%.
The associated private companies which hold the 80 million shares increased their position through a number of on-market trades between December 2018 and March 2019.
READ: Ironbark Zinc's EM survey identifies broad strong bedrock anomalism at Captains Flat
Last month, Ironbark completed a HeliSAM electromagnetic (EM) survey over the large-scale Jerangle prospect at its Captains Flat base metals project in NSW.
The survey was financed by Ironbark and Glencore PLC (LON:GLEN) subsidiary New South Wales Base Metals on a 50:50 basis, which reflects the project ownership.